acetylcholine‐binding protein (AChBP) from Lymnaea stagnalis, was solved from good
quality density maps despite a 4.2 Å overall resolution. The structure unambiguously reveals
the positions and orientations of all five three‐fingered toxin molecules inserted at the
AChBP subunit interfaces and the conformational changes associated with toxin binding.
AChBP loops C and F that border the ligand‐binding pocket move markedly from their …